<template>
<div>
    <!-- 面包屑 -->
    <Breadcrumb name1="商品管理" name2="添加商品" />
    <!-- 卡片 -->
    <el-card>
        <!-- 提示区 -->
        <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
        </el-alert>
        <!-- 步骤条 -->
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>

        <!-- tab栏区域 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
            <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="addForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight">
                        <el-input v-model="addForm.goods_weight" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                        <el-input v-model="addForm.goods_number" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类" prop="goods_cat">
                        <el-cascader expand-trigger="hover" :options="catelist" :props="cateProps" v-model="addForm.goods_cat" @change="handleChange">
                        </el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                    <!-- 渲染表单的Item项 -->
                    <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                        <el-checkbox-group v-model="item.attr_vals">
                            <el-checkbox border :label="item" v-for="(item, i) in item.attr_vals" :key="i">{{ item }}</el-checkbox>
                        </el-checkbox-group>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                        <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                    <!-- action 表示图片图片要上传到的后台api地址 -->
                    <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                        <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                    <!-- 富文本编辑器 -->
                    <quill-editor v-model="addForm.goods_introduce">

                    </quill-editor>
                    <!-- 添加商品的按钮 -->
                    <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                </el-tab-pane>
            </el-tabs>

            <!-- 图片预览 -->
            <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
                <img :src="previewPath" alt="" class="previewImg" />
            </el-dialog>
        </el-form>
    </el-card>
</div>
</template>

<script>
import Breadcrumb from '../breadcrumb/Breadcrumb.vue'
import _ from 'lodash'
export default {
    components: {
        Breadcrumb,
    },
    data() {
        return {
            activeIndex: '0',
            // 添加商品表单数据
            addForm: {
                goods_name: '',
                goods_price: 0,
                goods_weight: 0,
                goods_number: 0,
                // 商品所属的分类数组
                goods_cat: [],
                // 图片的数组
                pics: [],
                // 商品的详细描述
                goods_introduce: '',
                attrs: []
            },
            addFormRules: {
                goods_name: [{
                    required: true,
                    message: '请输入商品名称',
                    trigger: 'blur'
                }, ],
                goods_price: [{
                    required: true,
                    message: '请输入商品价格',
                    trigger: 'blur'
                }, ],
                goods_weight: [{
                    required: true,
                    message: '请输入商品重量',
                    trigger: 'blur'
                }, ],
                goods_number: [{
                    required: true,
                    message: '请输入商品数量',
                    trigger: 'blur'
                }, ],
                goods_cat: [{
                    required: true,
                    message: '请选择商品分类',
                    trigger: 'blur'
                }, ],
            },
            // 商品分类
            catelist: [],
            cateProps: {
                label: 'cat_name',
                value: 'cat_id',
                children: 'children',
            },
            // 动态参数列表数据
            manyTableData: [],
            // 静态参数列表数据
            onlyTableData: [],
            // 上传图片的URL地址
            uploadURL: 'https://lianghj.top:8888/api/private/v1/upload',
            // 图片上传组件的header请求头
            headerObj: {
                Authorization: window.sessionStorage.getItem('token'),
            },
            previewPath: '',
            previewVisible: false,
        }
    },
    created() {
        this.getCateList()
    },
    methods: {
        // 获取所有商品分类数据
        async getCateList() {
            const {
                data: res
            } = await this.$http.get('categories')

            if (res.meta.status !== 200) {
                return this.$message.error('获取分类失败')
            }

            this.catelist = res.data
            console.log(this.catelist)
        },
        // 级联选择器选中项变化，触发函数
        handleChange() {
            console.log(this.addForm.goods_cat)
            if (this.addForm.goods_cat.length !== 3) {
                this.addForm.goods_cat = []
            }
        },
        beforeTabLeave(activeName, oldActiveName) {
            // activeName 即将离开的标签页名字
            // oldActiveName 即将进入的标签页名字
            if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                this.$message.error('请先选择商品分类')
                return false
            }
        },
        async tabClicked() {
            // 证明访问的是动态列表
            if (this.activeIndex === '1') {
                console.log('动态参数')
                const {
                    data: res
                } = await this.$http.get(
                    `categories/${this.cateId}/attributes`, {
                        params: {
                            sel: 'many'
                        },
                    }
                )
                if (res.meta.status !== 200) {
                    return this.$message.error('获取动态列表失败!')
                }
                res.data.forEach(
                    (item) =>
                    (item.attr_vals =
                        item.attr_vals.length === 0 ? [] : item.attr_vals.split(' '))
                )
                // console.log(res)
                this.manyTableData = res.data
            }
            if (this.activeIndex === '2') {
                const {
                    data: res
                } = await this.$http.get(
                    `categories/${this.cateId}/attributes`, {
                        params: {
                            sel: 'only'
                        },
                    }
                )
                if (res.meta.status !== 200) {
                    return this.$message.error('获取静态列表失败!')
                }
                this.onlyTableData = res.data
                console.log(this.onlyTableData)
            }
        },
        // 处理预览图片
        handlePreview(file) {
            console.log(this.file)
            this.previewPath = file.response.data.url.replace('http://127.0.0.1', 'https://lianghj.top')
            this.previewVisible = true
            console.log('预览图片', file.response.data.url)
        },
        // 处理移除图片的操作
        handleRemove(file) {
            // 1. 获取将要删除的图片的临时路径
            const filePath = file.response.data.tmp_path
            // 2. 从 pics 数组中找到这个图片的对应的索引值
            const index = this.addForm.pics.findIndex((x) => x.pic === filePath)
            // 3. 调用数组的splice方法,把图片信息对象,从pics数组中移除
            this.addForm.pics.splice(index, 1)
            console.log('移除图片', file, this.addForm)
        },
        // 监听图片上传成功的事件
        handleSuccess(resposne) {
            // 1. 拼接得到一个图片信息对象
            const picInfo = {
                pic: resposne.data.tmp_path
            }
            // 2. 将图片信息对象,push到pics数组中
            this.addForm.pics.push(picInfo)
            console.log(resposne)
            console.log(this.addForm)
        },
        // 添加商品
        add() {
            this.$refs.addFormRef.validate(
                (async valid => {
                    if (!valid) {
                        return this.$message.error('请填写必要的表单项!')
                    }
                    // 执行添加业务逻辑
                    // lodash  cloneDeep(obj)
                    const form = _.cloneDeep(this.addForm)
                    form.goods_cat = form.goods_cat.join(',')
                    //  处理动态参数
                    this.manyTableData.forEach(item => {
                        const newInfo = {
                            attr_id: item.attr_id,
                            attr_value: item.attr_vals.join(' ')
                        }
                        this.addForm.attrs.push(newInfo)
                    })
                    // 处理静态属性
                    this.onlyTableData.forEach(item => {
                        const newInfo = {
                            attr_id: item.attr_id,
                            attr_value: item.attr_vals
                        }
                        this.addForm.attrs.push(newInfo)
                    })
                    form.attrs = this.addForm.attrs
                    console.log(form);

                    // 发请请求添加商品
                    // 商品的名称,必须是唯一的
                    const {
                        data: res
                    } = await this.$http.post('goods', form)
                    if (res.meta.status != 201) {
                        return this.$message.error('添加商品失败!')

                    }
                    this.$message.success('添加商品成功!')
                    this.$router.push('/goods')

                })
            )
        }
    },
    computed: {
        cateId() {
            if (this.addForm.goods_cat.length === 3) {
                return this.addForm.goods_cat[2]
            }
            return null
        },
    },
}
</script>

<style lang="less" scoped>
.el-steps {
    margin: 15px 0;
}

.el-step__title {
    font-size: 13px;
}

.el-checkbox {
    margin: 0 5px 0 0 !important;
}

.previewImg {
    width: 100%;
}

.btnAdd {
    margin-top: 15px;
}
</style>
